Top 5 — Ranked by Evidence
Strong
Glucose / Dextrose
Pairs with sodium to aid water absorption in oral rehydration solutions
Oral rehydration solution 13.5 g glucose/L; sports 40-80 g/L (4-8%); endurance 30-60 g/hr (90 g/hr glucose+fructose 2:1); post-exercise 1.0-1.2 g/kg plus protein.
Moderate
Glycerol (Glycerin)
Supports hydration by retaining more fluid than the same drink alone
Before exercise: 1.0 to 1.2 g/kg body weight (or 1.4 g/kg fat-free mass) with about 21
Moderate
Sodium / Electrolyte Sodium
Fluid retention and rehydration after exercise
1,500–2,300 mg/day dietary sodium (AI/UL); electrolyte replacement during exercise: 5
Moderate
HydroMax® (Glycerol Powder — Glanbia Nutritionals) (Glycerol Powder — Glanbia Nutritionals) (Glycerol Powder — Glanbia Nutritionals) (Glycerol Powder — Glanbia Nutritionals)
Supports pre-exercise hydration by retaining more fluid than water alone
Pre-exercise glycerol hyperhydration: typically 1.0–1.5 g glycerol per kg body weight
Moderate
HydroPrime® (Stabilized Glycerol — NNB Nutrition)
Supports hydration by retaining more fluid than the same drink alone
2–6g glycerol (as HydroPrime®) 1–2× daily; pre-exercise hyperhydration: 1g/kg bodywei
📈 Fastest Growing Hydration Ingredients
Branded ingredients seeing rapid growth in formulator adoption and clinical research in 2024–2026.
Trending
Moderate
HydroPrime® (Stabilized Glycerol — NNB Nutrition)
Supports hydration by retaining more fluid than the same drink alone
No HydroPrime® trials. Glycerol trials used 1.0 to 1.2 g glycerol per kg body weight (or 1.4…
Trending
Preliminary
Cococin® (Freeze-Dried Coconut Water — Sabinsa)
Rehydration, as tested with ordinary coconut water rather than Cococin
No oral dose of Cococin has been tested in a published human trial. The coconut water trials…
Trending
Moderate
Sodium / Electrolyte Sodium
Fluid retention and rehydration after exercise
Adult Adequate Intake 1,500 mg/day; cut back if above 2,300 mg/day. Rehydration studies used…
🔬 Future Hydration Ingredients to Watch
Lower current evidence but active research underway — these may become top picks within 2–3 years.
Watch
Limited
Coconut Water
Rehydration after exercise
After exercise: a volume equal to 120% of the fluid lost, drunk over the first hour of a…
Watch
Strong
Glucose / Dextrose
Pairs with sodium to aid water absorption in oral rehydration solutions
During endurance exercise: up to about 60 g of carbohydrate an hour from a single sugar such…
Recommended Hydration Products
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Real products featuring the best-evidenced hydration ingredients ranked above - chosen for clinically-studied forms and doses, third-party testing, and value. Match the supplement to your specific need.
Best for high-sodium daily hydration
Amazon →
LMNT Zero Sugar Electrolytes Variety Pack
1000 mg sodium/200 mg K/60 mg Mg sticks, 12 ct
Sugar-free, high-sodium electrolyte mix favored for active and low-carb routines; variety pack to sample flavors.
Best for gentle, absorbable magnesium
Amazon →
Doctor's Best High Absorption Magnesium Glycinate Lysinate
200 mg elemental Mg/serving tablets, 240 ct
Fully chelated glycinate/lysinate magnesium is well absorbed and easy on digestion; vegan, non-GMO, large value count.
Best for everyday electrolyte balance
Amazon →
NOW Supplements Potassium Citrate 99 mg
99 mg potassium (as citrate) veg caps, 180 ct
Citrate form supplying 99 mg potassium per capsule to round out electrolyte intake; non-GMO, allergen-free.
Best for full-spectrum trace minerals
Amazon →
Trace Minerals ConcenTrace Trace Mineral Drops
70+ ionic trace minerals liquid, 8 fl oz
Concentrated ionic minerals from Great Salt Lake you can add to any water bottle; non-GMO verified, vegan, additive-free.
All Hydration Ingredients (8)
Strong
Glucose / Dextrose
Pairs with sodium to aid water absorption in oral rehydration solutions
Oral rehydration solution 13.5 g glucose/L; sports 40-80 g/L (4-8%); endurance 30-60 g/hr (90 g/hr glucose+fructose 2:1); post-exercise 1.0-1.2 g/kg plus protein.
Moderate
Glycerol (Glycerin)
Supports hydration by retaining more fluid than the same drink alone
Before exercise: 1.0 to 1.2 g/kg body weight (or 1.4 g/kg fat-free mass) with about 21
Moderate
Sodium / Electrolyte Sodium
Fluid retention and rehydration after exercise
1,500–2,300 mg/day dietary sodium (AI/UL); electrolyte replacement during exercise: 5
Moderate
HydroMax® (Glycerol Powder — Glanbia Nutritionals) (Glycerol Powder — Glanbia Nutritionals) (Glycerol Powder — Glanbia Nutritionals) (Glycerol Powder — Glanbia Nutritionals)
Supports pre-exercise hydration by retaining more fluid than water alone
Pre-exercise glycerol hyperhydration: typically 1.0–1.5 g glycerol per kg body weight
Moderate
HydroPrime® (Stabilized Glycerol — NNB Nutrition)
Supports hydration by retaining more fluid than the same drink alone
2–6g glycerol (as HydroPrime®) 1–2× daily; pre-exercise hyperhydration: 1g/kg bodywei
Strong
Potassium Chloride
Rehydration after exercise-induced fluid loss
Repletion regimens commonly use 20 mEq/day to prevent and 40-100 mEq/day to treat low
Limited
Coconut Water
Rehydration after exercise
HYDRATION: 240-500 mL (8-17 oz) general. POST-EX REHYDRATION (~2% body mass loss): 15
Preliminary
Cococin® (Coconut Water Powder — Sabinsa)
Rehydration, as tested with ordinary coconut water rather than Cococin
No oral dose of Cococin has been established or tested in a published human trial; the cited studies used a topical serum or ordinary coconut water, not Cococin powder.